球状星团

词组短语

globular cluster

与球状星团相关的网络例句 [注：此内容来源于网络，仅供参考]

Omega Centauri is also the brightest globular cluster, at apparent visual magnitude 3.9 it is visible to southern observers with the unaided eye.

半人马座欧米伽星团也是最明亮的球状星团，其亮度大小显示为3.9星等，在南半球的观察者用肉眼就可以欣赏它了。

Caption:: A sixth magnitude globular cluster in the constellation Canes Venatici, this ball of 500,000 stars is approximately 160 light years across and 100,000 light years from Earth.

这个星团叫 M3，是梅西尔星表的第3个成员，它位於猎犬座，是一个球状星团。

Rho Ophiuchus is the triple star embedded in blue nebulosity near the top center. The bright red star just below center, and embedded in orangish nebulosity is Antares.

明亮的红色星位置偏下，大的球状星团 M4 刚好是在心宿二的右侧、较小的球状星团ngc6144则在心宿二的上方。

Several days before Comet 73P shot across the Ring Nebula,astro-paparazzi Nicolas Outters caught the comet sneaking past M13, the Great Globular cluster in Hercules.

在彗星73P跨越M57前几天，天象摄影家（直译是天文狗仔队——译注）Nicolas Outters 拍下了彗星从球状星团M13附近溜过的图像。M13是位于武仙座的著名球状星团。

Of the 200 or so globular clusters that survive today, Omega Centauri is the largest, containing over ten million stars.

目前在银河系中幸存的约200个这样的球状星团中，半人马座欧米伽星团是已知的最大的一个，拥有大约超过一千万颗恒星。

Caption:: Located in the constellation Herculues, M13 is the largest and brightest globular cluster in the northern sky, third in the whole sky, after the Omega Centaurus and 47 Tucanae.

位於武仙座的球状星团M13，是北天球最大最亮的球状星团，在全天排行第三，仅次於南天球的半人马座奥米加星团，杜鹃座47。

This spectacular nebula is energised by an exceptionally high concentration of massive stars, often referred to as super star clusters.

这个壮观的星云由内部一群高度密集的大质量恒星照亮，这些恒星群一般归类于超级星团（话说我只知道球状星团和疏散星团，这个算什么星团？

Explanation: M4 is a globular cluster visible in dark skies about one degree west of the bright star Antares in the constellation Scorpius. M4 is perhaps the closest globular cluster at 7000 light years, meaning that we see M4 only as it was 7000 years ago, near the dawn of recorded human history. Although containing hundreds of thousands of stars and spanning over 50 light-years, M4 is one of the smallest and sparsest globular clusters known. A particularly unusual aspect for a globular cluster is M4's central bar of stars.

M4是一个肉眼可见的球状星团，位于天蝎座心宿二的东面约一度位置。M4可能是最靠近我们的球状星团距离约7000光年，这意味着我们看到的是7000年以前的M4，即人类历史有文字记载的开始阶段，它跨越50光年包含有数10万颗恒星。M4是已知在尺度及包含恒星数量上最小的球状星团。M4独特之处是它中心的棒状结构。

The 29 F globular clusters in the galaxy are selected as samples in my paper (The space distribution and motional orbits of the samples have not been researched in detail before.).According to the basic parameters: azimuth coordinates, distances from the sun, radial velocities and proper motions of sample clusters, the initial positions and velocities of the samples are reduced using the galactic coordinates, and their orbits are integrated by numerical method for three different galactic gravitational potential models.

本文选用银河系中29个累积光谱型为F型的球状星团作为样本(这些样本星团的空间分布和运动特征都没有被详细地讨论过)，根据它们的基本资料：方位坐标、日心距、视向速度，绝对自行等参数，归算处理得出了各样本星团的空间分布和运动速度。

Plates of globular cluster M3, taken with the 40cm refractor at Sheshan station of Shanghai Astronomical Observatory, are used by this work. The difference of epoch of these plates is up to 81years. The positions and absolute proper motions of 24 stars in ACT catalogue, which links with the Hipparcos Catalogue based on the International Celestial Reference System, are used as the reference frame. Using the central overlapping principle, the absolute proper motions of 534 stars in the region of about 100'×100' around the cluster are determined. After the membership determination of the stars which based on the data of proper motions, average absolute proper motion components for the cluster of -0.3±0.3 mas/yr in R.A.

本文使用上海天文台佘山40厘米折射望远镜拍摄的14张最长时间跨度为81年的球状星团M3底片的PDS扫描结果，使用与 Hipparcos星表相联系的基于国际大球惯性参考系的ACT星表中的 24颗恒星的位置和绝对自行为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近100'×100'天区内534颗恒星的位置和绝对自行，并利用这些自行对成员概率进行了估算，得到这个星团的赤经方向绝对自行为- 0.3±0.3mas/yr，赤纬方向绝对自行为-3.1±0.3mas／yr。

与球状星团相关的网络解释 [注：此内容来源于网络，仅供参考]

strange attractor：奇怪吸引子

1964年法国天文学家哈侬(Henon M)从研究球状星团以及洛伦兹吸引子中得到启发,给出了下列的Henon映射:1971年法国物理学家茹厄勒(Ruelle D)和荷兰数学家塔肯斯(Takens F)为耗散系统引入了"奇怪吸引子"(strange attractor)这一概念,提出了一个新的湍流发生机制,

Centaurus：半人马座

说明: 半人马座(Centaurus) 是南天星空中最让人印象深刻的一个星座. 天空上本银河系穿过这个扩张中的天体,其中的一颗星是最靠近我们太阳的一个恒星系统,称为半人马座 a 星(Alpha Centauri)以及本银河系最大的球状星团,

cluster variable：星团变星

显示金牛座T型变星有物质流出的现象,喷发的速度由每秒225公里至425公里不等,而且随时间变化. 一种短週期变星,变光週期介於1.2-30小时之间,大多存在某些球状星团之中. 也常称为短週期变星 (short-period cepheid) 或 星团变星 (cluster variable).

disk globular cluster：盘族球状星团

dish 碟形天线 | disk globular cluster 盘族球状星团 | dispersion measure 频散量度

halo dwarf：晕族矮星

Hale Telescope 海尔望远镜 | halo dwarf 晕族矮星 | halo globular cluster 晕族球状星团

planetology：行星学

在行星学(planetology)上,指行星形成时,物质向中心塌陷所释放出来的热能. 球状星团的赫罗图上,有部份的恒星分布在红巨星和主序星之间. 因为它们在赫罗图的分布,几乎是水平的,故称为水平分支. 天琴RR变星(RRLyraestars)就是星团水平分支的一部份.

relaxation time：弛缓时间

一般来说,一个系统内的质点越多,系统的弛缓时间(relaxation time)越长. 球状星团的弛缓时间约8,000万年,星系的弛缓时间约一年(所谓弛缓时间指的是一个系统内的质点经过多次碰撞达到平衡状态所需的时间). 对於球状星团而言,